US Army Corps Report – Phase 1 Construction Activities Next 90 Days – February 2014

Muddy River Flood Risk Management & Environmental Restoration Project Phase 1
Construction Activities Next 90 Days February 2014

General: The Muddy River Flood Risk Management & Environmental Restoration Phase 1 Construction Project is located in the footprint generally between the Riverway downstream to Avenue Louis Pasteur. The major project components involve the installation of a 10‐foot by 24‐foot box culvert under the Riverway roadway, the installation of 10‐foot by 24‐foot box culvert under the Brookline Avenue roadway, daylighting of the area between the Riverway and Brookline Avenue, and daylighting of the area between Brookline Avenue and Avenue Louis Pasteur. Daylighting is the removal of existing twin 72″ culverts and excavation of the area to return the waterway to a natural state. This Notice is intended to identify the general construction activities that will be performed in the next 90 days. A figure that shows the existing conditions and the proposed improvements is at the end of this report. February 2014 through April 2014 Period:

  • On 28 September we installed traffic islands, temporary traffic signals, activated recently installed signals and installed a significant number of traffic signs that allowed us to turn Brookline Avenue into a one‐way street inbound between the Riverway Connector and Park Drive. This was done so that we could continue the installation of support shafts and culvert sections under Brookline Avenue outbound and one of the inbound lanes. We have installed as many culvert sections that we can under the current traffic scheme so an additional traffic modification is needed.
  • The next traffic modification for the third stage of construction of the Brookline Avenue culvert will require relocating the four Brookline Avenue inbound lanes to the left over the area where culvert installation has been completed. As in the last traffic lane shift we will do the traffic change on a Saturday to minimize impact to the neighborhood traffic. The next traffic shift is tentatively scheduled for Saturday, 01 March 2014. The current traffic pattern in place can be seen in the first traffic pattern figure shown below. The traffic pattern that will be implemented in the third stage can be seen on the traffic pattern below.
  • The contractor has been working on the relocation of a 12 inch and a 48 inch water main under Brookline Avenue. These relocations will be completed in mid February. There has been no disruption of water service to the neighborhood during this relocation operation.
  • After the traffic shift, the contractor will install sheet pilings, excavate within the sheeting to get to the proper grade, install additional drilled shafts, perform required utility relocations, place pile caps and invert slabs (the culvert floor) and install additional culvert sections.
  • During this next phase the contractor will also start construction of a diversion structure that will be used to divert storm water flow from two large storm drains into the Muddy River conduits. These storm drains currently run down Brookline Avenue and eventually empty into the Charles River. However, they will not fit over the culverts that are being installed without major roadway modifications. The diversion structure will allow the storm water flow to empty into the new Brookline Avenue culvert.
  • At the end of this page we have included some pictures that show the installed culverts sections and the 48 inch relocated water line.
  • If you any questions, require additional information or would like to be added to the Project Contact List, please email the project mailbox at MuddyRiver@usace.army.mil

These pictures that show the installed culverts sections and the 48 inch relocated water line.

Traffic Patterns

The next traffic modification for the third stage of construction of the Brookline Avenue culvert will require relocating the four Brookline Avenue inbound lanes to the left over the area where culvert installation has been completed. As in the last traffic lane shift we will do the traffic change on a Saturday to minimize impact to the neighborhood traffic. The next traffic shift is tentatively scheduled for Saturday, 01 March 2014.

Project Phase 1

(U.S. Army Corps of Engineers photos)

Muddy River rises March 14, 2010

(U.S. Army Corps of Engineers photos)